JP2022512734A - エキソソーム標的化二重特異性抗体 - Google Patents
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Abstract
Description
本明細書に記載される発明は、第1のエキソソーム関連タンパク質及び第2のエキソソーム関連タンパク質としてのプログラム死リガンド1(「PD-L1」)に特異的に結合することによって、エキソソームを同時に標的化することができる二重特異性抗体に関する。そのような二重特異性抗体は、T細胞活性化を阻害するPD-L1などのリガンドを含有する腫瘍細胞由来のエキソソームを標的とすることによって、免疫細胞による抗腫瘍活性の抑制を破壊することができる。したがって、本発明の組成物及び方法は、癌の治療に使用することができる。
本明細書に記載される発明は、第1及び第2のエキソソーム関連タンパク質に特異的に結合することによって、エキソソームを同時に標的化することができる二重特異性抗体に関する。より具体的には、本発明による第2のエピソーム関連タンパク質は、プログラム死リガンド1(「PD-L1」)である。したがって、本発明による二重特異性抗体は、エキソソーム会合タンパク質上のエピトープに特異的に結合する第1の抗原結合部分と、PD-L1上のエピトープに特異的に結合する第2の抗原結合部分とを有する。本発明による二重特異性抗体は、T細胞活性化を阻害するPD-L1などのリガンドを含有する腫瘍細胞由来エキソソームを標的とすることによって、免疫細胞による抗腫瘍活性の抑制を破壊することができる。したがって、二重特異性抗体は、様々な種類の癌に罹患している対象を治療するために使用され得る。したがって、本発明はまた、癌治療プロトコルの構成要素として、本発明の二重特異性抗体の投与及び送達を必要とする対象への投与及び送達のために製剤化される組成物を含む。
以下の例は、エキソソームを標的とする二重特異性抗体の設計及び特性付けを説明する。
正常組織及び腫瘍組織の両方に由来する細胞は、少なくとも2つのクラスの細胞外小胞(EV)、エキソソーム及びエクトソームを生成することができ、これらは異なる生物学的プロセスを介して誘導される。EVは、細胞間コミュニケーションにおいて役割を果たすと認識されている。EVは、小胞の脂質二重層に挿入されるタンパク質を含む、一連の異なるタンパク質構成要素を特徴とする。エキソソーム膜に存在することが公知のタンパク質は、テトラスパニン、熱ショックタンパク質、膜輸送体、細胞表面受容体、及び脂質結合分子を含むがこれらに限定されない機能クラスに分類することができる。これらの機能クラスを含む認識されたタンパク質には、TSG101、CD9、CD10、CD26、CD37、CD45/ICAM-1、CD63、CD69、CD81、EGFR、EGFRvIII、EpCAM、フロチリン1、グリピカン1、HER2、HER3、HSP70、HSP90、NKCC2、及びPD-L1が含まれるが、これらに限定されない。CD63などのエキソソームの表面に存在するタンパク質は、それらの表面分子に特異的な抗体によって検出することができる。図2は、22Rv1前立腺癌細胞に由来するエキソソームが、抗CD63被覆ビーズとの相互作用を介して用量依存的に単離され得ることを示す。エキソソームに関連する膜貫通タンパク質の組成は、エキソソームが由来する細胞型に依存し得る。エキソソームのバルク調製物をラテックスビーズにコンジュゲートさせ、フローサイトメトリによって抗CD63抗体で検出することができる(図3)。バルクエキソソーム被覆ビーズは、抗EPN1抗体IMM20059とも反応性であった。IMM20059染色は、ビーズ表面上に存在するエキソソームに依存していた;BSA被覆ビーズはIMM20059と相互作用しなかった。データは、EPN1がエキソソームの少なくとも一部の表面に存在することを示唆する。
ヒトハイブリドーマPR045-2H11を、頭頸部癌患者のリンパ節から単離したヒトB細胞をB56T融合パートナーと融合させることによって作製した。ヒトB細胞とB56Tとの融合は、本質的にUSPTO#EP2242836’’Method of making hybrid cells that express useful antibodies.’’に記載されている電気融合によって実施した。PR045-2H11の可変重鎖(VH)ドメイン及び可変軽鎖(VL)ドメインをコードするヌクレオチド配列を、PR045-2H11を産生したハイブリドーマ株の細胞から単離したRNAのRT-PCR増幅によって得て、得られた抗体cDNAを配列決定反応に供した。配列番号1は、ハイブリドーマから単離したPR045-2H11のVHに対応し、配列番号3はVLに対応する。RT-PCR戦略に起因して、これらの配列は、可変ドメインのフレームワーク1の5’側最末端部分に対応する領域を欠く。IGHV及びIGKL遺伝子割り当てを、公知の生殖系列遺伝子配列との相同性に基づいて予測し、VH及びVL配列の真の5’末端の代用物として使用した。IMM20059は、PR045-2H11のVHドメイン及びVLドメインを含む組換え発現されたヒトIgG1抗体である。IMM20059 VH(配列番号5)の発現断片を、IGHV3-48*02のフレームワーク1の5’末端に対応する生殖系列配列を使用して作製した。PR045-2H11 VL(配列番号7)の完全長発現断片を、IGKV3-11*01のフレームワーク1の5’末端に対応する生殖系列配列を使用して作製した。配列番号5及び配列番号7に対応する断片を、二重プロモータIgG1発現ベクターへのギブソン様式のクローニングを容易にするために、さらなる5’及び3’伸長を用いて合成した。VH断片及びVL断片によってコードされる対応するタンパク質配列を、それぞれ配列番号6及び配列番号8に定義する。VH及びVLドメインのコード領域は、それぞれ15及び14ヌクレオチドだけ生殖系列配列とは異なる体細胞高頻度突然変異の特徴を有する。
2つのユニークな標的抗原に結合することができる抗体である二重特異性抗体は、2つの単一特異性抗体からの可変ドメインを1つの抗体様分子に組み合わせることによって作製することができる。複数の二重特異性抗体構造が文献に記載されている(Brinkman,U.and Kontermann,R.mAbs,9:182-212;2017)。二重特異性抗体構造の一実施形態は、二重可変ドメインIg(DVD-Ig)である。図8は、2つの単一特異性抗体及び2つの単一特異性抗体から作製されたDVD-Ig型二重特異性抗体のカートゥーン表示である。二重特異性抗体は、標的の1つのみを発現するものと比較して、両方の標的抗原を発現する細胞、ひいてはエキソソームに対する標的化選択性を改善することができる(Robinson et al BR J Cancer 99:1415-1425;2008)。図9は、EPN1又はPD-L1のみを標的化することができる単一特異性抗体と比較した、EPN1及びPD-L1の両方に結合することができる二重特異性抗体によるエキソソーム標的化のカートゥーン表示である。
4つの抗EPN1/抗PD-L1二重特異性抗体を、二重特異性抗体の重鎖及び軽鎖をコードするプラスミドで一過性にトランスフェクトしたHEK293哺乳動物細胞株の誘導体の馴化培地からプロテインAアフィニティクロマトグラフィによって精製した。4つの二重特異性抗体を含む可変重鎖ドメイン及び可変軽鎖ドメインのアミノ酸配列は、配列番号33及び35、配列番号33及び37、配列番号39及び41、ならびに配列番号39及び43であった。精製された抗体をドットブロット分析に供して、それらが組換えEPN1及び組換えPD-L1の両方に結合することができるかどうかを決定した。精製された組換えタンパク質を、図10に示すように3つの用量レベルでスポットし、4つの抗EPN1/抗PD-L1二重特異性抗体でプローブした。単一特異性IMM20059/PR045-2H11及びアテゾリズマブは、それぞれEPN1及びPD-L1への結合についての陽性対照として機能した。デングウイルスのコートタンパク質に特異的な抗体を陰性対照として使用した。4つの二重特異性抗体はすべて、IMM20059と同様のレベルでEPN1に結合した。PD-L1への結合は、抗PD-L1可変ドメインがDVD-IgGのN末端(Ate/PR045-2H11:S及びAte/PR045-2H11:L)に存在することを必要とした。それらを抗EPN1可変ドメインのC末端(PR045-2H11/Ate:S及びPR045-2H11/Ate:L)に配置すると、ドットブロット形式でPD-L1に結合する能力が低下した。可変軽鎖構築物内のリンカーの長さは結合に影響を及ぼさなかった。配列番号37及び39に対応する可変軽鎖ドメインを含む抗体は、ドットブロット形式で組換えPD-L1に同等に結合した。
配列表
GACTCTCCTGTGCAGCCTCTGGATTCACCTTCAGTATCCATAGCCTGAATTGGGTCCGCCAGGCTCCAGGGAAGGGACTGGAGTGGGTTTCGTATATTAGTAGTAACAGTACTACCATATATTACGCAGACTCTGTGAAGGGCCGATTCACCATCTCCAGAGACAATGCCAAGGACTCCCTGTATCTGCAAATGAACAGCCTCAGAGACGAGGACACGGCTGTATATTACTGTGCGAGAGACTACTACTGTACTGGTGGTACCTGCTTCTTTCTTCCTGACCTCTGGGGCCGGGGAGCCCTGGTCACCGTCTCCTCAGCCTCCACCAAGGGCCCATCGGTCTTCCCCCTGGCGC
配列番号2-VH PR045-2H11アミノ酸配列
LSCAASGFTFSIHSLNWVRQAPGKGLEWVSYISSNSTTIYYADSVKGRFTISRDNAKDSLYLQMNSLRDEDTAVYYCARDYYCTGGTCFFLPDLWGRGALVTVSSASTKKGPSVFPLA
AAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAATATCAGCAACTTCTTAGCCTGGTACCAACACAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGATGCATCCATCAGGGCCACTGGCATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCAGTCTCACCATCAGCAGCCTGGAGCCTGAAGATTTTGCAGTTTATTTCTGTCAGCAGCGTTACAACTGGCTCACTTTCGGCGGAGGGACCAAGGTAGAGATCAAACGAACTGTGGCTGCACCATCTGTCTTCATCT
配列番号4-VL PR045-2H11アミノ酸配列
RATLSCRASQNISNFLAWYQHKPGQAPRLLIYDASIRATGIPARFSGSGSGTDFSLTISSLEPEDFAVYFCQQRYNWLTFGGGTKVEIKRTVAAPSVFI
ACAGGCGCGCACTCCGAGGTGCAGCTGGTGGAGTCTGGGGGAGGCTTGGTACAGCCTGGGGGGTCCCTGAGACTCTCCTGTGCAGCCTCTGGATTCACCTTCAGTATCCATAGCCTGAATTGGGTCCGCCAGGCTCCAGGGAAGGGACTGGAGTGGGTTTCGTATATTAGTAGTAACAGTACTACCATATATTACGCAGACTCTGTGAAGGGCCGATTCACCATCTCCAGAGACAATGCCAAGGACTCCCTGTATCTGCAAATGAACAGCCTCAGAGACGAGGACACGGCTGTATATTACTGTGCGAGAGACTACTACTGTACTGGTGGTACCTGCTTCTTTCTTCCTGACCTCTGGGGCCGGGGAGCCCTGGTCACCGTCTCCTCAGCCTCCACCAAGGGCCCATC
配列番号6-IMM20059 VHドメインアミノ酸配列
EVQLVESGGGLVQPGGSLRLSCAASGFTFSIHSLNWVRQAPGKGLEWVSYISSNSTTIYYADSVKGRFTISRDNAKDSLYLQMNSLRDEDTAVYYCARDYYCTGGTCFFLPDLWGRGALVTVSSASTKGPSVFPL
TCAGATACCTCCGGAGAAATTGTGTTGACACAGTCTCCAGCCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAATATCAGCAACTTCTTAGCCTGGTACCAACACAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGATGCATCCATCAGGGCCACTGGCATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCAGTCTCACCATCAGCAGCCTGGAGCCTGAAGATTTTGCAGTTTATTTCTGTCAGCAGCGTTACAACTGGCTCACTTTCGGCGGAGGGACCAAGGTAGAGATCAAACGAACTGTGGCTG
配列番号8-IMM20059 VLドメインアミノ酸配列
EIVLTQSPATLSLSPGERATLSCRASQNISNFLAWYQHKPGQAPRLLIYDASIRATGIPARFSGSGSGTDFSLTISSLEPEDFAVYFCQQRYNWLTFGGGTKVEIKRTVA
SIHSLN
配列番号10-IMM20059 H-CDR2
YISSNSTTIYYADSVKG
配列番号11-IMM20059 H-CDR3
DYYCTGGTCFFLPDL
配列番号12-IMM20059 L-CDR1
RASQNISNFLA
配列番号13-IMM20059 L-CDR2
DASIRAT
配列番号14-IMM20059 L-CDR3
QQRYNWLT
EVQLVESGGGLVQPGGSLRLSCAASGFTFSDSWIHWVRQAPGKGLEWVAWISPYGGSTYYADSVKGRFTISADTSKNTAYLQMNSLRAEDTAVYYCARRHWPGGFDYWGQGTLVTVSSASTKGPSVFPLA
配列番号16-アテゾリズマブVLドメイン
DIQMTQSPSSLSASVGDRVTITCRASQDVSTAVAWYQQKPGKAPKLLIYSASFLYSGVPSRFSGSGSGTDFTLTISSLQPEDFATYYCQQYLYHPATFGQGTKVEIKRTVA
SDSWIH
配列番号18-アテゾリズマブH-CDR2
PYGGSTYYADSVKG
配列番号19-アテゾリズマブH-CDR3
ARRHWPGGFDY
配列番号20-アテゾリズマブL-CDR1
RASQDVSTAVA
配列番号21-アテゾリズマブL-CDR2
SASFLYS
配列番号22-アテゾリズマブL-CDR3
QQYLYHPAT
EVQLLESGGGLVQPGGSLRLSCAASGFTFSSYIMMWVRQAPGKGLEWVSSIYPSGGITFYADTVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARIKLGTVTTVDYWGQGTLVTVSSASTKGPSVFPLA
配列番号24-アベルマブVLドメイン
QSALTQPASVSGSPGQSITISCTGTSSDVGGYNYVSWYQQHPGKAPKLMIYDVSNRPSGV
SNRFSGSKSGNTASLTISGLQAEDEADYYCSSYTSSSTRVFGTGTKVTVLG
EVQLVESGGGLVQPGGSLRLSCAASGFTFSRYWMSWVRQAPGKGLEWVANIKQDGSEKYYVDSVKGRFTISRDNAKNSLYLQMNSLRAEDTAVYYCAREGGWFGELAFDYWGQGTLVTVSSASTKGPSVFPLA
配列番号26-デュルバルマブVLドメイン
EIVLTQSPGTLSLSPGERATLSCRASQRVSSSYLAWYQQKPGQAPRLLIYDASSRATGIPDRFSGSGSGTDFTLTISRLEPEDFAVYYCQQYGSLPWTFGQGTKVEIKRTVA
QVQLVQSGAEVKKPGSSVKVSCKTSGDTFSTYAISWVRQAPGQGLEWMGGIIPIFGKAHYAQKFQGRVTITADESTSTAYMELSSLRSEDTAVYFCARKFHFVSGSPFGMDVWGQGTTVTVSSASTKGPSVFPLA
配列番号28-BMS-936559 VLドメイン
EIVLTQSPATLSLSPGERATLSCRASQSVSSYLAWYQQKPGQAPRLLIYDASNRATGIPARFSGSGSGTDFTLTISSLEP
EDFAVYYCQQRSNWPTFGQGTKVEIKRTVA
ASTKGPSVFPLAP
配列番号30-VL「L」リンカー
TVAAPSVFIFPP
配列番号31-VL「S」リンカー
TVAAP
GAGGTGCAGCTGGTGGAGTCTGGGGGAGGCTTGGTACAGCCTGGGGGGTCCCTGAGACTCTCCTGTGCAGCCTCTGGATTCACCTTCAGTATCCATAGCCTGAATTGGGTCCGCCAGGCTCCAGGGAAGGGACTGGAGTGGGTTTCGTATATTAGTAGTAACAGTACTACCATATATTACGCAGACTCTGTGAAGGGCCGATTCACCATCTCCAGAGACAATGCCAAGGACTCCCTGTATCTGCAAATGAACAGCCTCAGAGACGAGGACACGGCTGTATATTACTGTGCGAGAGACTACTACTGTACTGGTGGTACCTGCTTCTTTCTTCCTGACCTCTGGGGCCGGGGAGCCCTGGTCACCGTCTCCTCAGCGAGCACAAAAGGACCATCTGTATTTCCACTCGCCCCCGAAGTACAGCTCGTAGAGTCCGGAGGAGGCCTGGTCCAACCTGGTGGTTCCCTTCGACTGTCATGTGCCGCGTCTGGCTTCACTTTTTCCGATTCATGGATACACTGGGTGAGGCAAGCACCTGGCAAAGGTTTGGAATGGGTGGCCTGGATCTCACCGTATGGGGGTAGTACTTATTATGCGGATTCAGTAAAGGGAAGATTTACCATTTCAGCGGACACAAGTAAAAATACCGCCTATTTGCAGATGAACAGCCTGCGAGCGGAAGACACTGCTGTCTATTATTGTGCTAGACGCCACTGGCCTGGTGGTTTTGACTACTGGGGGCAGGGCACTTTGGTGACCGTTTCCTCA
配列番号33-IMM20059-L-ATE二重特異性VHドメインアミノ酸配列
EVQLVESGGGLVQPGGSLRLSCAASGFTFSIHSLNWVRQAPGKGLEWVSYISSNSTTIYYADSVKGRFTISRDNAKDSLYLQMNSLRDEDTAVYYCARDYYCTGGTCFFLPDLWGRGALVTVSSASTKGPSVFPLAPEVQLVESGGGLVQPGGSLRLSCAASGFTFSDSWIHWVRQAPGKGLEWVAWISPYGGSTYYADSVKGRFTISADTSKNTAYLQMNSLRAEDTAVYYCARRHWPGGFDYWGQGTLVTVSS
GAAATTGTGTTGACACAGTCTCCAGCCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAATATCAGCAACTTCTTAGCCTGGTACCAACACAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGATGCATCCATCAGGGCCACTGGCATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCAGTCTCACCATCAGCAGCCTGGAGCCTGAAGATTTTGCAGTTTATTTCTGTCAGCAGCGTTACAACTGGCTCACTTTCGGCGGAGGGACCAAGGTAGAGATCAAACGAACAGTAGCAGCTCCGTCAGTTTTTATTTTTCCTCCAGATATTCAGATGACCCAGTCCCCGTCCTCTCTCTCCGCTAGTGTAGGTGATAGAGTGACAATAACATGCCGGGCCAGCCAGGATGTATCCACGGCGGTCGCGTGGTACCAGCAGAAACCTGGGAAAGCCCCCAAACTGCTTATTTATAGCGCCAGCTTCTTGTACTCAGGAGTACCTAGCAGATTTAGCGGTTCAGGAAGTGGGACTGATTTTACACTCACTATATCTTCCCTGCAACCGGAGGATTTTGCAACATATTATTGTCAACAATATCTCTACCATCCCGCGACATTCGGGCAGGGCACAAAAGTAGAGATCAAACGA
配列番号35-IMM20059-L-ATE二重特異性VLドメインアミノ酸配列
EIVLTQSPATLSLSPGERATLSCRASQNISNFLAWYQHKPGQAPRLLIYDASIRATGIPARFSGSGSGTDFSLTISSLEPEDFAVYFCQQRYNWLTFGGGTKVEIKRTVAAPSVFIFPPDIQMTQSPSSLSASVGDRVTITCRASQDVSTAVAWYQQKPGKAPKLLIYSASFLYSGVPSRFSGSGSGTDFTLTISSLQPEDFATYYCQQYLYHPATFGQGTKVEIKR
GAAATTGTGTTGACACAGTCTCCAGCCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAATATCAGCAACTTCTTAGCCTGGTACCAACACAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGATGCATCCATCAGGGCCACTGGCATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCAGTCTCACCATCAGCAGCCTGGAGCCTGAAGATTTTGCAGTTTATTTCTGTCAGCAGCGTTACAACTGGCTCACTTTCGGCGGAGGGACCAAGGTAGAGATCAAACGAACAGTAGCAGCTCCGGATATTCAGATGACCCAGTCCCCGTCCTCTCTCTCCGCTAGTGTAGGTGATAGAGTGACAATAACATGCCGGGCCAGCCAGGATGTATCCACGGCGGTCGCGTGGTACCAGCAGAAACCTGGGAAAGCCCCCAAACTGCTTATTTATAGCGCCAGCTTCTTGTACTCAGGAGTACCTAGCAGATTTAGCGGTTCAGGAAGTGGGACTGATTTTACACTCACTATATCTTCCCTGCAACCGGAGGATTTTGCAACATATTATTGTCAACAATATCTCTACCATCCCGCGACATTCGGGCAGGGCACAAAAGTAGAGATCAAACGA
配列番号37-2H11-S-ATE二重特異性VLドメインアミノ酸配列
EIVLTQSPATLSLSPGERATLSCRASQNISNFLAWYQHKPGQAPRLLIYDASIRATGIPARFSGSGSGTDFSLTISSLEPEDFAVYFCQQRYNWLTFGGGTKVEIKRTVAAPDIQMTQSPSSLSASVGDRVTITCRASQDVSTAVAWYQQKPGKAPKLLIYSASFLYSGVPSRFSGSGSGTDFTLTISSLQPEDFATYYCQQYLYHPATFGQGTKVEIKR
配列番号38-ATE-L-2H11二重特異性VHドメインヌクレオチド配列
GAAGTACAGCTCGTAGAGTCCGGAGGAGGCCTGGTCCAACCTGGTGGTTCCCTTCGACTGTCATGTGCCGCGTCTGGCTTCACTTTTTCCGATTCATGGATACACTGGGTGAGGCAAGCACCTGGCAAAGGTTTGGAATGGGTGGCCTGGATCTCACCGTATGGGGGTAGTACTTATTATGCGGATTCAGTAAAGGGAAGATTTACCATTTCAGCGGACACAAGTAAAAATACCGCCTATTTGCAGATGAACAGCCTGCGAGCGGAAGACACTGCTGTCTATTATTGTGCTAGACGCCACTGGCCTGGTGGTTTTGACTACTGGGGGCAGGGCACTTTGGTGACCGTTTCCTCAGCCGCGAGCACAAAAGGACCATCTGTATTTCCACTCGCCCCCGAGGTGCAGCTGGTGGAGTCTGGGGGAGGCTTGGTACAGCCTGGGGGGTCCCTGAGACTCTCCTGTGCAGCCTCTGGATTCACCTTCAGTATCCATAGCCTGAATTGGGTCCGCCAGGCTCCAGGGAAGGGACTGGAGTGGGTTTCGTATATTAGTAGTAACAGTACTACCATATATTACGCAGACTCTGTGAAGGGCCGATTCACCATCTCCAGAGACAATGCCAAGGACTCCCTGTATCTGCAAATGAACAGCCTCAGAGACGAGGACACGGCTGTATATTACTGTGCGAGAGACTACTACTGTACTGGTGGTACCTGCTTCTTTCTTCCTGACCTCTGGGGCCGGGGAGCCCTGGTCACCGTCTCCTCAGCCTCCACCAAGGGCCCATCGGTC
配列番号39-ATE-L-2H11二重特異性VHドメインアミノ酸配列
EVQLVESGGGLVQPGGSLRLSCAASGFTFSDSWIHWVRQAPGKGLEWVAWISPYGGSTYYADSVKGRFTISADTSKNTAYLQMNSLRAEDTAVYYCARRHWPGGFDYWGQGTLVTVSSAASTKGPSVFPLAPEVQLVESGGGLVQPGGSLRLSCAASGFTFSIHSLNWVRQAPGKGLEWVSYISSNSTTIYYADSVKGRFTISRDNAKDSLYLQMNSLRDEDTAVYYCARDYYCTGGTCFFLPDLWGRGALVTVSSASTKGPSV
GATATTCAGATGACCCAGTCCCCGTCCTCTCTCTCCGCTAGTGTAGGTGATAGAGTGACAATAACATGCCGGGCCAGCCAGGATGTATCCACGGCGGTCGCGTGGTACCAGCAGAAACCTGGGAAAGCCCCCAAACTGCTTATTTATAGCGCCAGCTTCTTGTACTCAGGAGTACCTAGCAGATTTAGCGGTTCAGGAAGTGGGACTGATTTTACACTCACTATATCTTCCCTGCAACCGGAGGATTTTGCAACATATTATTGTCAACAATATCTCTACCATCCCGCGACATTCGGGCAGGGCACAAAAGTAGAGATCAAACGAACCGTCGCCGCACCATCAGTTTTTATTTTTCCTCCAGAAATTGTGTTGACACAGTCTCCAGCCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAATATCAGCAACTTCTTAGCCTGGTACCAACACAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGATGCATCCATCAGGGCCACTGGCATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCAGTCTCACCATCAGCAGCCTGGAGCCTGAAGATTTTGCAGTTTATTTCTGTCAGCAGCGTTACAACTGGCTCACTTTCGGCGGAGGGACCAAGGTAGAGATCAAACGA
配列番号41-ATE-L-2H11二重特異性VLドメインアミノ酸配列
DIQMTQSPSSLSASVGDRVTITCRASQDVSTAVAWYQQKPGKAPKLLIYSASFLYSGVPSRFSGSGSGTDFTLTISSLQPEDFATYYCQQYLYHPATFGQGTKVEIKRTVAAPSVFIFPPEIVLTQSPATLSLSPGERATLSCRASQNISNFLAWYQHKPGQAPRLLIYDASIRATGIPARFSGSGSGTDFSLTISSLEPEDFAVYFCQQRYNWLTFGGGTKVEIKR
GATATTCAGATGACCCAGTCCCCGTCCTCTCTCTCCGCTAGTGTAGGTGATAGAGTGACAATAACATGCCGGGCCAGCCAGGATGTATCCACGGCGGTCGCGTGGTACCAGCAGAAACCTGGGAAAGCCCCCAAACTGCTTATTTATAGCGCCAGCTTCTTGTACTCAGGAGTACCTAGCAGATTTAGCGGTTCAGGAAGTGGGACTGATTTTACACTCACTATATCTTCCCTGCAACCGGAGGATTTTGCAACATATTATTGTCAACAATATCTCTACCATCCCGCGACATTCGGGCAGGGCACAAAAGTAGAGATCAAACGAACAGTAGCAGCTCCGGAAATTGTGTTGACACAGTCTCCAGCCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAATATCAGCAACTTCTTAGCCTGGTACCAACACAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGATGCATCCATCAGGGCCACTGGCATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCAGTCTCACCATCAGCAGCCTGGAGCCTGAAGATTTTGCAGTTTATTTCTGTCAGCAGCGTTACAACTGGCTCACTTTCGGCGGAGGGACCAAGGTAGAGATCAAA
配列番号43-ATE-S-2H11二重特異性VLドメインアミノ酸配列
DIQMTQSPSSLSASVGDRVTITCRASQDVSTAVAWYQQKPGKAPKLLIYSASFLYSGVPSRFSGSGSGTDFTLTISSLQPEDFATYYCQQYLYHPATFGQGTKVEIKRTVAAPEIVLTQSPATLSLSPGERATLSCRASQNISNFLAWYQHKPGQAPRLLIYDASIRATGIPARFSGSGSGTDFSLTISSLEPEDFAVYFCQQRYNWLTFGGGTKVEIK
QVQLQESGPELVKPGASVKMSCKASGYTFTTYVIHWVKQKPGQGLEWIGYFDPNNDGTKYNERFKGKATLTSDRSSSTAYMELSSLTSEDSAVYYCARSRTYYDASMDYWGQGTSVTVSS
配列番号45-抗CD-63抗体のVLドメインアミノ酸配列
DIWMTQSPSSLAVSPGEKVTMNCKSSQSVLYSSNQKNFLAWYQQKPGQSPKLLIYWASTRESGVPDRFTGSGGSGTDFTLTISNIQTEDLAVYYCQQIFSSYTFGGGTKLELKR
EVQLVESGGGLVQPGGSLRLSCAASGFNIKDTYIHWVRQAPGKGLEWVARIYPTNGYTRYADSVKGRFTISADTSKNTAYLQMNSLRAEDTAVYYCSRWGGDGFYAMDYWGQGTLVTVSSASTKGPSVFPLA
配列番号47-抗HER2抗体のVLドメインアミノ酸配列
DIQMTQSPSSLSASVGDRVTITCRASQDVNTAVAWYQQKPGKAPKLLIYSASFLYSGVPSRFSGSRSGTDFTLTISSLQPEDFATYYCQQHYTTPPTFGQGTKVEIK
EVQLVQSGPGLVQPGGSVRISCAASGYTFTNYGMNWVKQAPGKGLEWMGWINTYTGESTYADSFKGRFTFSLDTSASAAYLQINSLRAEDTAVYYCARFAIKGDYWGQGTLLTVSS
配列番号49-抗EpCAM抗体のVLドメインアミノ酸配列
DIQMTQSPSSLSASVGDRVTITCRSTKSLLHSNGITYLYWYQQKPGKAPKLLIYQMSNLASGVPSRFSSSGSGTDFTLTISSLQPEDFATYYCAQNLEIPRTFGQGTKVELK
QVQLVQSGAEVKKPGASVKVSCKASGYTFTSHWMHWVRQAPGQGLEWIGEFNPSNGRTNYNEKFKSKATMTVDTSTNTAYMELSSLRSEDTAVYYCASRDYDYDGRYFDYWGQGTLVTVSSASTKGPSVFPLA
配列番号51-抗HER3抗体のVLドメインアミノ酸配列
DIQMTQSPSSLSASVGDRVTITCSASSSVTYMYWYQQKPGKAPKLLIYDTSNLASGVPSRFSGSGSGTDYTFTISSLQPEDIATYYCQQWSSHIFTFGQGTKVEIK
QVQLKQSGPGLVQPSQSLSITCTVSGFSLTNYGVHWVRQSPGKGLEWLGVIWSGGNTDYNTPFTSRLSINKDNSKSQVFFKMNSLQSNDTAIYYCARALTYYDYEFAYWGQGTLVTVSAASTKGPSVFPL
配列番号53-抗EGFR抗体のVLドメインアミノ酸配列
DILLTQSPVILSVSPGERVSFSCRASQSIGTNIHWYQQRTNGSPRLLIKYASESISGIPSRFSGSGSGTDFTLSINSVESEDIADYYCQQNNNWPTTFGAGTKLELK
Claims (20)
- (A)エキソソームタンパク質に特異的な第1の抗原結合部分、及び
(B)プログラム細胞死リガンド1(PD-L1)に特異的な第2の抗原結合部分
を含む、二重特異性抗体。 - 第2の抗原結合部分が、
(1)(a)配列番号17のアミノ酸配列を含む重鎖相補性決定領域(「CDR」)1;
(b)配列番号18のアミノ酸配列を含む重鎖CDR2;及び
(c)配列番号19のアミノ酸配列を含む重鎖CDR3
の少なくとも1つ;ならびに
(2)(a)配列番号20のアミノ酸配列を含む軽鎖CDR1;
(b)配列番号21のアミノ酸配列を含む軽鎖CDR2;及び
(c)配列番号22のアミノ酸配列を含む軽鎖CDR3
の少なくとも1つ
を含む、請求項1に記載の二重特異性抗体。 - 第2の抗原結合部分が、アテゾリズマブ、アベルマブ、デュルバルマブ及びBMS-936559から選択される抗PD-L1抗体のVH鎖又はその断片、及びVL鎖又はその断片を含む、請求項1に記載の二重特異性抗体。
- 第1の抗原結合部分が、EPN1、CD9、CD10、CD26、CD37、CD45/ICAM-1、CD63、CD69、CD81、EGFR、EGFRvIII、EpCAM、フロチリン1、グリピカン1、HER2、HER3、HSP70、HSP90及びNKCC2から選択されるエキソソームタンパク質に特異的に結合する、請求項1~3のいずれかに記載の二重特異性抗体。
- 第1の抗原結合部分がヒトEPN1上のエピトープに特異的に結合する、請求項4に記載の二重特異性抗体。
- 第1の抗原結合部分が、
(1)配列番号2のアミノ酸配列又はその断片を含む可変重鎖;及び
(2)配列番号4のアミノ酸配列又はその断片を含む可変軽鎖
を含む、請求項5に記載の二重特異性抗体。 - 第1の抗原結合部分が、
(1)配列番号6のアミノ酸配列又はその断片を含む可変重鎖;及び
(2)配列番号8のアミノ酸配列又はその断片を含む可変軽鎖
を含む、請求項5に記載の二重特異性抗体。 - 第1の抗原結合部分が、
(1)(a)配列番号9のアミノ酸配列を含む重鎖CDR1;
(b)配列番号10のアミノ酸配列を含む重鎖CDR2;及び
(c)配列番号11のアミノ酸配列を含む重鎖CDR3
の少なくとも1つ;ならびに
(2)(a)配列番号12のアミノ酸配列を含む軽鎖CDR1;
(b)配列番号13のアミノ酸配列を含む軽鎖CDR2;及び
(c)配列番号14のアミノ酸配列を含む軽鎖CDR3
の少なくとも1つ
を含む、請求項5に記載の二重特異性抗体。 - 第1及び第2の抗原結合部分が直接又はリンカーによって連結されている、請求項1~8のいずれかに記載の二重特異性抗体。
- リンカーが、化学的リンカー又はポリペプチドリンカーからなる群より選択される、請求項9に記載の二重特異性抗体。
- ノブ・イントゥ・ホール誘導体、SEED-IgG、DEKK変異型Fc、DVD-Ig、ヘテロFc-scFv、IgG-scFv、scFv2-Fc、scDB-Fcからなる群より選択される、請求項1~10のいずれかに記載の二重特異性抗体。
- Fcドメインを含有せず、タンデムscFv、ダイアボディ、Fab-scFvからなる群より選択される、請求項1~10のいずれかに記載の二重特異性抗体。
- 完全ヒト抗体又はヒト化抗体である、請求項1~12のいずれかに記載の二重特異性抗体。
- 請求項1~13のいずれかに記載の二重特異性抗体と、少なくとも1つの薬学的に許容される賦形剤とを含む医薬組成物。
- 請求項1~13のいずれかに記載の少なくとも1つの二重特異性抗体と、適切な保存容器、pH緩衝液及びキットを使用するための説明書のうちの少なくとも1つとを含むキット。
- 対象において癌を治療するための方法であって、治療有効量の請求項1~13のいずれかに記載の二重特異性抗体を前記対象に投与することを含む方法。
- 二重特異性抗体が、腫瘍細胞由来のエキソソームを標的とすることによって免疫細胞による抗腫瘍活性の抑制を破壊する、請求項16に記載の方法。
- 抗腫瘍活性の抑制がCD8+サプレッサT細胞によって媒介される、請求項17に記載の方法。
- 対象がヒトである、請求項16~18のいずれかに記載いずれかに記載の方法。
- 約0.5~20mg/kgの二重特異性抗体を対象に投与する、請求項16~19のいずれかに記載の方法。
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